What was found
FLT 151 - TTN-GSO - ON APPROACH TO GSO, FLIGHT ATTENDANT REPORTED UNUSUAL SMELL IN CABIN. AIRCRAFT ASKED FOR PRIORITY AND LANDED WITHOUT INCIDENT. GROUND RUNS ISOLATED CABIN PACK RUNNING FULL HOT. CABIN PACK DEFERRED UNDER MEL 21-12-1. TROUBLESHOOTING REVEALED SEIZED ACM. REMOVED AND REPLACED ACM. OPS CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE WITHOUT FURTHER INCIDENT. (M)